Fans of "The Office" were sad to learn this week that the upcoming season of the NBC comedy would be its last. But not need to fret. NBC is already moving forward with "The Farm," a spinoff centered around Rainn Wilson's character Dwight Schrute. The network annouced on Thursday that Thomas Middleditch has been cast as Jeb Schrute, Dwight's brother. Middleditch can currently be seen on screen in the Will Ferrell comedy "The Campaign." Majandra Delfino had already been cast as Dwight and Jeb's sister, Fannie.